The force due to gravity between two objects can be described using the equation Fg = G M1 M2 / d2. According to this equation, if the distance between two objects increases, what happens to the gravitational force between them?
A) The force increases.
B) The force decreases.
C) The force drops instantly to zero.
D) The gravitational force is not affected by distance.
B
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A pendulum is made with a 4.00 kg mass suspended at the end of a thin rod. The period of the small motion simple harmonic motion is 1.00 sec. What is the length of the thin rod?
A. 24.8 cm B. 29.7 cm C. 31.4 cm D. 34.1 cm E. 36.2 cm
A 22-A current flows into a parallel combination of 4.0 ?, 6.0 ?, and 12 ? resistors
(a) What current flows through the 12-? resistor? (b) What current flows through the 6.0-? resistor? (c) What current flows through the 4.0-? resistor?
A 4.0-kg mass on the end of a string rotates in a circular motion on a horizontal frictionless table. The mass has a constant speed of 2.0 m/s and the radius of the circle is 0.80 m. What is the magnitude of the resultant force acting on the mass?
a. 39 N b. 20 N c. 44 N d. 0 N e. 30 N
The average intensity of the sunlight in Miami, Florida, is 1.04 kW/m2. For surfaces on which the light is all absorbed,
what is the average value of the radiation pressure due to this sunlight in Miami? (c = 3.00 × 108 m/s, ?0 = 4? × 10-7 T ? m/A, ?0 = 8.85 × 10-12 C2/N ? m2) A) 9.78 µPa B) 2.28 µPa C) 6.93 µPa D) 1.73 µPa E) 3.47 µPa